Black Hole Portal into Hidden Valleys

Details Black Hole Portal into Hidden Valleys Black Hole Portal into Hidden Valleys

2010-12-13

arxiv.org/abs/1012.2893v1

Phys.Rev.D83:106002,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 2 figures

Scientific paper

10.1103/PhysRevD.83.106002

Superradiant instability turns rotating astrophysical black holes into unique probes of light axions. We consider what happens when a light axion is coupled to a strongly coupled hidden gauge sector. In this case superradiance results in an adiabatic increase of a hidden sector CP-violating $\theta$-parameter in a near horizon region. This may trigger a first order phase transition in the gauge sector. As a result a significant fraction of a black hole mass is released as a cloud of hidden mesons and can be later converted into electromagnetic radiation. This results in a violent electromagnetic burst. The characteristic frequency of such bursts may range approximately from 100 eV to 100 MeV.

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